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authorDavid S. Miller <davem@davemloft.net>2008-02-14 00:58:44 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-17 22:43:34 -0800
commit966d905634de4433cea465fdcea19503c4ae260f (patch)
tree866315805e9a820fedc0904fde53069bdef8cf75 /arch/sparc64
parent54cd6ddec77b75e6926d73d263aec72255b24030 (diff)
downloadblackbird-op-linux-966d905634de4433cea465fdcea19503c4ae260f.tar.gz
blackbird-op-linux-966d905634de4433cea465fdcea19503c4ae260f.zip
[SPARC64]: Add -mtune=ultrasparc3 if possible.
This gives better heuristics for the cost of a multiply (fixed 5 cycles), rather than the 'ultrasparc' setting (variable, and unpredictable if the second argument is non-constant). Example code size savings: text data bss dec hex filename 3823690 304040 448880 4576610 45d562 vmlinux 3824521 304040 448880 4577441 45d8a1 vmlinux.orig Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sparc64/Makefile b/arch/sparc64/Makefile
index 848e33410b43..f0c22f826982 100644
--- a/arch/sparc64/Makefile
+++ b/arch/sparc64/Makefile
@@ -17,6 +17,7 @@ LDFLAGS := -m elf64_sparc
KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow \
-ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare \
-Wa,--undeclared-regs
+KBUILD_CFLAGS += $(call cc-option,-mtune=ultrasparc3)
KBUILD_AFLAGS += -m64 -mcpu=ultrasparc -Wa,--undeclared-regs
ifeq ($(CONFIG_MCOUNT),y)
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